Casey Anthony defense team expert and noted forensic pathologist Werner Spitz challenges the findings of the Orange-Osceola Medical Examiner's autopsy done on the remains of Caylee Marie Anthony, according to a new report the defense filed with the prosecution.

Spitz, based in Michigan, conducted a second autopsy on the child's remains in late 2008, and he concluded there was no homicide.

Spitz particularly takes issue with Garavaglia's saying: "Although there is no trauma evident on the skeleton, there is duct tape over the lower facial region still attached to head hair. This duct tape was clearly placed prior to decomposition, keeping the mandible [jaw] in place."

In his report dated March 10, Spitz states Garavaglia's statement is "flawed" because of evidence about the movement of the remains he discovered in his second autopsy and because "DNA results of the duct tape yielded no DNA from the deceased."

In addition, Spitz found "the lack of entomological evidence found on the duct tape is also inconsistent with the duct tape being placed over any orifice that would have attached to the duct tape during decomposition (skin would be expected to adhere to duct tape)."

The evidence discussed in three areas, Spitz said, "seriously call into question the statement 'clearly placed prior to decomposition, keeping the mandible in place.'"

Casey Anthony, 24, is accused of killing her 2-year-old daughter Caylee Marie Anthony in the summer of 2008. Her trial is slated to begin in May.

The Spitz report was due on Friday under a court-ordered deadline for the defense to provide the state with the expert witness's findings. The defense team met that deadline last week, according to the prosecution.

The Spitz findings take on an essential piece of the state's case: Garavaglia's conclusion that Caylee's death was a homicide.

Spitz said the cause of death is undetermined, which is the same conclusion Garavaglia reached.

However, while Garavaglia concluded that the child's death was a homicide, Spitz said, "The manner of death is also undetermined because there is no scientific information available that the death was at the hands of another."

During Garavaglia's deposition, recently released in transcript form, she dismissed notions that the child might have died by drowning or suffocating, specifically noting that in such cases the victims are not normally found dumped in a bag with "duct tape on their face."

In his report, Spitz mentioned the "salient points" of his second autopsy conducted Dec. 23-34, 2008.

"The skull had not been opened, at the first autopsy, in accordance with normal protocols as when dealing with skeletal remains," Spitz wrote. "Since the skull had not been previously opened, this indicates that the interior of the skull had not been previously examined."

He found a "cake of dark brown residue" on the left side of the skull.

"The location of the residue indicates that the left side of the skull was down during most by far of the decomposition process, causing sediment to precipitate to that area."

The initial autopsy and photos show that the duct tape found on the remains was stuck to the hair and not the mandible bone.

"Therefore if the skull was once lying on its left side, as clearly evidenced by the location of the sediment, it is highly unlikely that both the skull and the mandible, which would have been disarticulated during decomposition, would roll back to an almost perfect anatomical position," Spitz noted.

Because of his conclusions based on the movement of the remains and the lack of DNA evidence on the tape, Spitz called into question and found flaws with Dr. Garavaglia's statement.